What Are the Key Conditions for Superparamagnetism?
Several conditions are essential for superparamagnetism to occur: - Nanoparticle Size: The diameter of the nanoparticles typically ranges from 1 to 10 nm. - Temperature: The temperature must be above the blocking temperature to ensure thermal fluctuations can induce random flips in magnetization. - Magnetic Anisotropy: The energy barrier that a magnetic moment must overcome to flip its direction must be low enough to allow for these thermal-induced flips.
